code: def pytest_addoption(parser):
      parser.addoption(
          "--runslow",
          action="store_true",
          default=False,
          help="run slow tests",
      )
      parser.addoption(
          "--backend",
          action="store",
          default=None,
          help="Run tests with a backend by auto-converting nx graphs to backend graphs",
      )
      parser.addoption(
          "--fallback-to-nx",
          action="store_true",
          default=False,
          help="Run nx function if a backend doesn't implement a dispatchable function"
          " (use with --backend)",
      )
  
file_path: networkx/networkx/conftest.py
imports: import os
  import sys
  import warnings
  from importlib.metadata import entry_points
  import pytest
  import networkx
label_desc: Use image node_id 1 for calling a global function with example usage: pytest_addoption(parser) without return types